XScreenSaver Local Password Disclosure Vulnerability

BID:17471

Info

XScreenSaver Local Password Disclosure Vulnerability

Bugtraq ID: 17471
Class: Design Error
CVE: CVE-2004-2655
Remote: Yes
Local: Yes
Published: Apr 11 2006 12:00AM
Updated: Dec 07 2006 03:29AM
Credit: The original discoverer of this issue is currently unknown.
Vulnerable: Ubuntu Ubuntu Linux 5.0 4 powerpc
Ubuntu Ubuntu Linux 5.0 4 i386
Ubuntu Ubuntu Linux 5.0 4 amd64
Ubuntu Ubuntu Linux 4.1 ppc
Ubuntu Ubuntu Linux 4.1 ia64
Ubuntu Ubuntu Linux 4.1 ia32
SuSE SUSE Linux Enterprise Server 8
+ Linux kernel 2.4.21
+ Linux kernel 2.4.19
SuSE Linux Enterprise Server 9
SGI ProPack 3.0 SP6
S.u.S.E. Novell Linux Desktop 9.0
S.u.S.E. Linux Enterprise Server for S/390 9.0
S.u.S.E. Linux Enterprise Server for S/390
Redhat Enterprise Linux WS 3
Redhat Enterprise Linux WS 2.1 IA64
Redhat Enterprise Linux WS 2.1
Redhat Enterprise Linux ES 3
Redhat Enterprise Linux ES 2.1 IA64
Redhat Enterprise Linux ES 2.1
Redhat Enterprise Linux AS 3
Redhat Enterprise Linux AS 2.1 IA64
Redhat Enterprise Linux AS 2.1
Redhat Desktop 3.0
Redhat Advanced Workstation for the Itanium Processor 2.1 IA64
Redhat Advanced Workstation for the Itanium Processor 2.1
MandrakeSoft Corporate Server 3.0 x86_64
MandrakeSoft Corporate Server 3.0
Jamie Zawinski XScreenSaver 4.17
Jamie Zawinski XScreenSaver 4.16
Jamie Zawinski XScreenSaver 4.15
Jamie Zawinski XScreenSaver 4.14
Avaya Interactive Response 1.3
Avaya Interactive Response 1.2.1
Avaya Interactive Response
Avaya Integrated Management 2.1
Avaya Integrated Management
Avaya CVLAN
Not Vulnerable: Jamie Zawinski XScreenSaver 4.18

Discussion

XScreenSaver Local Password Disclosure Vulnerability

XScreenSaver is prone to a local password-disclosure vulnerability. This issue is due to a flaw in the application that may result in the screen-unlock password being passed onto other applications that are already running on the computer.

This may disclose the password used to unlock the applications. The login password is typically used to unlock XScreenSaver, so this issue may reveal login passwords to attackers.

This issue is currently known to affect users who are running RDesktop on the locked computer, due to the interaction between the applications. This may result in the disclosure of the login password across the network. Other unknown applications in conjunction with XScreenSaver may result in a similar issue.

Version 4.14 and 4.16 are vulnerable to this issue; other versions may also be affected.

Exploit / POC

XScreenSaver Local Password Disclosure Vulnerability

Attackers use standard applications and network sniffers to exploit this issue.

Solution / Fix

XScreenSaver Local Password Disclosure Vulnerability

Solution:
The vendor has released version 4.18 of XScreenSaver to address this issue.

Please see the referenced vendor advisories for more information on obtaining and applying fixes.


Jamie Zawinski XScreenSaver 4.14

Jamie Zawinski XScreenSaver 4.16

Jamie Zawinski XScreenSaver 4.17

Jamie Zawinski XScreenSaver 4.15

References

XScreenSaver Local Password Disclosure Vulnerability

References:
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